Draw Captain America’s Shield with Python Turtle – A Complete Guide

This article demonstrates how to create Captain America’s shield using Python’s Turtle graphics library.

First, understand that Turtle requires explicit pen up, move, and pen down commands for each drawing action. A helper function setpen(x, y) is defined to lift the pen, move to coordinates, and place it down.

def setpen(x, y):
    # lift pen
    t.penup()
    # move pen to (x, y)
    t.goto(x, y)
    # put pen down
    t.pendown()
    t.setheading(0)

Next, a circle function draws filled circles with a specified radius and color, using many short line segments to approximate a smooth shape.

def circle(x, y, r, color):
    n = 36
    angle = 360 / n
    pi = 3.1415926
    c = 2 * pi * r
    l = c / n
    start_x = x - l / 2
    start_y = y + r
    setpen(start_x, start_y)
    t.pencolor(color)
    t.fillcolor(color)
    t.begin_fill()
    for i in range(n):
        t.forward(l)
        t.right(angle)
    t.end_fill()

A five_star function draws the white star at the center of the shield.

def five_star(l):
    setpen(0, 0)
    t.setheading(162)
    t.forward(150)
    t.setheading(0)
    t.fillcolor('WhiteSmoke')
    t.begin_fill()
    t.hideturtle()
    t.penup()
    for i in range(5):
        t.forward(l)
        t.right(144)
    t.end_fill()

The main shield function assembles the shield by drawing three concentric circles (red, white, red, blue) and then the star.

def shield():
    circle(0, 0, 300, 'red')
    circle(0, 0, 250, 'white')
    circle(0, 0, 200, 'red')
    circle(0, 0, 150, 'blue')
    five_star(284)

if __name__ == '__main__':
    shield()
    turtle.done()

Running the script produces an image of the shield with the correct color layers and central star.